TCP/IP Model
September 18, 2016It’s not a single protocol, it’s a suite of protocols TCP/IP is the first set of protocols used in internet... View Article
Archives
OSI Models Explaination
September 18, 2016Physical Layer Physical layer is the bottom(layer 1) of OSI model. It is responsible for the actual physical connection between... View Article
OSI Model
September 18, 2016International standard organization (ISO) established a committee in 1977 to develop an architecture for systems communication. Open System Interconnection (OSI)... View Article
Free Space Management
September 18, 2016Since disk is limited, we need to reuse it To keep track of free disk space, system maintains a free... View Article
Files & File System
September 18, 2016UNIX file system File is remarkable feature of UNIX File is a sequence of bytes of data that reside in... View Article
Buffer
September 18, 2016Buffer cache When a process wants to access data from a file, the kernel brings the data into main memory,... View Article
Grand Unified Boot loader (GRUB)
September 18, 2016GRUB GRUB is an operating system independent boot loader A multiboot software packet Flexible command line interface File system access... View Article
Kernel
September 18, 2016Introduction A kernel is a central component of an operating system. It acts as an interface between the user applications... View Article
Operating System
September 18, 2016What is operating system? Computer = set of resources Processors, memory, I/O & communication devices OS Enable use of resources... View Article
Line Coding Schemes
September 18, 2016Line Coding Unipolar Only two voltage levels are used. (1 means sending something, 0 means not sending) All signal levels... View Article